CVE-2025-54386Network attack vector

Arbitrary file overwrite via unsanitized ZIP paths

Published Aug 1, 2025 · Updated Aug 4, 2025

Path traversal in Traefik Proxy 2.11.27 and earlier, 3.0.0 through 3.4.4, and 3.5.0-rc1 allows attackers to overwrite host files. The pkg/plugins/client.go unzipFile function joins an archive entry name to the plugin destination without rejecting traversal segments, allowing a crafted ZIP entry to escape the directory and be opened for truncating writes. Exploitation requires WASM plugins, write access to a remote plugin asset loaded by the server, and delivery of a malicious plugin version; catalog plugins were unaffected, and no known impact was reported.

CVSS severity7.3
High
EPSS probability1.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Traefik Proxy 2.11.27 and earlier, 3.0.0 through 3.4.4, and 3.5.0-rc1 allows attackers to overwrite host files. The pkg/plugins/client.go unzipFile function joins an archive entry name to the plugin destination without rejecting traversal segments, allowing a crafted ZIP entry to escape the directory and be opened for truncating writes. Exploitation requires WASM plugins, write access to a remote plugin asset loaded by the server, and delivery of a malicious plugin version; catalog plugins were unaffected, and no known impact was reported.

The record

CVE
CVE-2025-54386
Published
Aug 1, 2025
Updated
Aug 4, 2025
Vendor
Traefik Labs
Product
Traefik Proxy
Classifications
CWE-30, CWE-22, T1195.002
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 2.11.27, < 2.11.28
  2. Affected versionversion=<= 3.0.0, < 3.4.5
  3. Affected versionversion=>= 3.5.0-rc1, < 3.5.0-rc2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Traefik Labs · Traefik Proxyversion=<= 2.11.27, < 2.11.28; version=<= 3.0.0, < 3.4.5; version=>= 3.5.0-rc1, < 3.5.0-rc2

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.3GitHubCVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-30Path Traversal: 'dir..filename'
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1195.002Compromise Software Supply Chain

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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